Question

1. sperm had a ___ chromosome

Y

X

X or Y

both x and Y

2. an egg has an ___ chromosome

Y

X

X or Y

both x and y

3. Normally a person receives ___ autosomes from each parents

22

44

2

46

Answer 1

1. X or Y

a sperm has either X chromosome or Y chromosome in it. When a sperm containing X chromosome fertilises an egg the zygote has XX chromosome in it, which is a girl child. whereas when a sperm containing Y chromosome fertilises an egg it results into a boy child.

2. X chromosome.

an egg always contains X chromosome in it.

3. normally a person receives 22 autosomes from each parent.

a human being has 46 chromosomes of which 22 autosomes are from each parent and the remaining 1 pair is the gametes which decides the sex of the person.